Patents by Inventor Ralf Stolle
Ralf Stolle has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20230340884Abstract: blade for a turbomachine is provided. The blade at its blade tip (4) includes blade tip armor (5), and an erosion protection layer (11) above the blade tip armor. For the blade, the erosion protection layer in the area of the blade tip has a layer thickness in the range of 5 µm to 100 µm, in particular 10 µm to 50 µm.Type: ApplicationFiled: April 28, 2021Publication date: October 26, 2023Inventors: Thomas UIHLEIN, Ralf STOLLE
-
Publication number: 20230323777Abstract: The invention relates to a guide vane assembly for a turbomachine, comprising a guide vane, which has a guide vane airfoil; and a guide vane holder. The guide vane is mounted in the guide vane holder such that the guide vane can be moved about an axis of rotation. For this purpose, the guide vane has at least one axle element, which is inserted into the guide vane holder in such a way that an outer lateral surface of the axle element faces an inner lateral surface of the guide vane holder. A protective coating is applied to at least parts of the guide vane airfoil. A protective coating is applied to at least one of the lateral surfaces. The invention also relates to a compressor module, a turbomachine, and a method for producing a guide vane assembly.Type: ApplicationFiled: July 19, 2021Publication date: October 12, 2023Applicant: MTU Aero Engines AGInventors: Ralf Stolle, Andreas Hölzel, Romain Mandard
-
Publication number: 20190301291Abstract: A method for manufacturing a blade (1) for a turbomachine, the blade having a hardfacing on its tip (4) and an erosion-protection coating (13) at least on its airfoil (3) is provided. Initially, a blade tip hardfacing is applied to the blade tip and, subsequently, a mask (10) is positioned in the region of the blade tip hardfacing, the mask covering the blade tip hardfacing, and, subsequently, the erosion-protection coating is deposited. The mask is removed after the erosion-protection coating is completed. A blade for a turbomachine, the blade having a hardfacing on its tip (4) and an erosion-protection coating (13) at least on its airfoil (3) is also provided. The erosion-protection coating at least partially covers the blade tip hardfacing, and the thickness of the erosion-protection coating decreases continuously in and/or toward the region of the blade tip hardfacing.Type: ApplicationFiled: May 12, 2016Publication date: October 3, 2019Inventors: Thomas Uihlein, Ralf Stolle
-
Patent number: 10415400Abstract: A method for manufacturing a blade (1) for a turbomachine, the blade having a hardfacing on its tip (4) and an erosion-protection coating (13) at least on its airfoil (3) is provided. Initially, a blade tip hardfacing is applied to the blade tip and, subsequently, a mask (10) is positioned in the region of the blade tip hardfacing, the mask covering the blade tip hardfacing, and, subsequently, the erosion-protection coating is deposited. The mask is removed after the erosion-protection coating is completed. A blade for a turbomachine, the blade having a hardfacing on its tip (4) and an erosion-protection coating (13) at least on its airfoil (3) is also provided. The erosion-protection coating at least partially covers the blade tip hardfacing, and the thickness of the erosion-protection coating decreases continuously in and/or toward the region of the blade tip hardfacing.Type: GrantFiled: May 12, 2016Date of Patent: September 17, 2019Assignee: MTU Aero Engines AGInventors: Thomas Uihlein, Ralf Stolle
-
Patent number: 10400613Abstract: The present invention relates to a method for producing a blade or blade arrangement of a turbomachine, which features the following steps: producing a blade (4) from at least one blade material, machining the blade in at least one region of the blade by a surface machining process, cleaning the surface of the blade depositing an erosion protection coating (10) of at least two layers of different hardness by physical vapor deposition in the at least one region, machining the erosion protection coating (10) by a coating smoothing process in order to establish a defined surface roughness. Furthermore, the invention relates to correspondingly produced blades or blade arrangements.Type: GrantFiled: May 19, 2017Date of Patent: September 3, 2019Assignee: MTU AERO ENGINES AGInventors: Joerg Windprechtinger, Ralf Stolle, Philipp Utz, Thomas Uihlein, Markus Gether
-
Patent number: 9920411Abstract: A method and device for partially masking a component or assembly during a coating process, the device including at least one masking plate for separating a region to be coated from a region to be masked, the masking plate having at least a portion of at least one opening which conforms closely to the contour of the component and is adapted to allow passage of the component therethrough is provided. In masked region, a gap is present along opening, at least one sealing element being disposed at the gap on the side of the masked region.Type: GrantFiled: March 2, 2016Date of Patent: March 20, 2018Assignee: MTU Aero Engines AGInventors: Thomas Uihlein, Ralf Stolle, Andreas Kaehny, Josef Lachner, Heinrich Walter, Michael Strasser, Werner Moosrainer, Michael Schober
-
Publication number: 20170335697Abstract: The present invention relates to a method for producing a blade or blade arrangement of a turbomachine, which features the following steps: producing a blade (4) from at least one blade material, machining the blade in at least one region of the blade by a surface machining process, cleaning the surface of the blade depositing an erosion protection coating (10) of at least two layers of different hardness by physical vapor deposition in the at least one region, machining the erosion protection coating (10) by a coating smoothing process in order to establish a defined surface roughness. Furthermore, the invention relates to correspondingly produced blades or blade arrangements.Type: ApplicationFiled: May 19, 2017Publication date: November 23, 2017Inventors: Joerg WINDPRECHTINGER, Ralf STOLLE, Philipp UTZ, Thomas UIHLEIN, Markus GETHER
-
Publication number: 20160333705Abstract: A method for producing a blade for a turbomachine, the blade having a blade tip cladding on its blade tip and an erosion-resistant layer at least on its blade airfoil, wherein firstly a blade tip cladding is applied on the blade tip, subsequently a poorly adhering sublayer is deposited on the blade tip cladding, and then the erosion-resistant layer is produced on the poorly adhering sublayer and the blade airfoil, the poorly adhering sublayer being removed again together with the erosion-resistant layer following completion of the erosion-resistant layer. The invention also relates to a blade for a turbomachine, the blade having a blade tip cladding on its blade tip and an erosion-resistant layer at least on its blade airfoil. The blade tip cladding comprises a metal matrix with incorporated hard material particles and an oxide layer arranged on the metal matrix.Type: ApplicationFiled: May 9, 2016Publication date: November 17, 2016Inventors: Thomas UIHLEIN, Josef LINSKA, Ralf STOLLE
-
Publication number: 20160333706Abstract: A method for manufacturing a blade (1) for a turbomachine, the blade having a hardfacing on its tip (4) and an erosion-protection coating (13) at least on its airfoil (3) is provided. Initially, a blade tip hardfacing is applied to the blade tip and, subsequently, a mask (10) is positioned in the region of the blade tip hardfacing, the mask covering the blade tip hardfacing, and, subsequently, the erosion-protection coating is deposited. The mask is removed after the erosion-protection coating is completed. A blade for a turbomachine, the blade having a hardfacing on its tip (4) and an erosion-protection coating (13) at least on its airfoil (3) is also provided. The erosion-protection coating at least partially covers the blade tip hardfacing, and the thickness of the erosion-protection coating decreases continuously in and/or toward the region of the blade tip hardfacing.Type: ApplicationFiled: May 12, 2016Publication date: November 17, 2016Inventors: Thomas Uihlein, Ralf Stolle
-
Publication number: 20160258046Abstract: A method and device for partially masking a component or assembly during a coating process, the device including at least one masking plate for separating a region to be coated from a region to be masked, the masking plate having at least a portion of at least one opening which conforms closely to the contour of the component and is adapted to allow passage of the component therethrough is provided. In masked region, a gap is present along opening, at least one sealing element being disposed at the gap on the side of the masked region.Type: ApplicationFiled: March 2, 2016Publication date: September 8, 2016Inventors: Thomas Uihlein, Ralf Stolle, Andreas Kaehny, Josef Lachner, Heinrich Walter, Michael Strasser, Werner Moosrainer, Michael Schober
-
Patent number: 8153274Abstract: A thermal barrier layer for metallic components, in particular for gas turbine components which are subject to high temperatures or hot gas, is disclosed. The thermal barrier layer includes an inner contact layer and an outer top layer, where the inner contact layer is applied to a surface of the component via an adhesion-promoting layer that is disposed therebetween, and between the outer top layer and the inner contact layer an intermediate layer is formed.Type: GrantFiled: June 12, 2007Date of Patent: April 10, 2012Assignee: MTU Aero Engines GmbHInventors: Stefan Schneiderbanger, Ralf Stolle, Thomas Uihlein, Wolfgang Wachter
-
Patent number: 7902386Abstract: The present invention provides a process for depolymerizing mixtures comprising mono- and/or diesters of polytetrahydrofuran in the presence of an acidic catalyst and of a C1- to C3-alcohol at temperatures of from 80 to 200° C. and a pressure of from 0.05 to 0.5 MPa, where the molar ratio of the C1- to C3-alcohol relative to the carboxyl groups present in the mixture is greater than 1.Type: GrantFiled: August 27, 2008Date of Patent: March 8, 2011Assignee: BASF SEInventors: Tobias Wabnitz, Ricardo Ferre Gimenez, Robert Laubner, Ralf Stolle
-
Publication number: 20100298583Abstract: The present invention provides a process for depolymerizing mixtures comprising mono- and/or diesters of polytetrahydrofuran in the presence of an acidic catalyst and of a C1- to C3-alcohol at temperatures of from 80 to 200° C. and a pressure of from 0.05 to 0.5 MPa, where the molar ratio of the C1- to C3-alcohol relative to the carboxyl groups present in the mixture is greater than 1.Type: ApplicationFiled: August 27, 2008Publication date: November 25, 2010Applicant: BASF SEInventors: Tobias Wabnitz, Ricardo Ferre Gimenez, Robert Laubner, Ralf Stolle
-
Publication number: 20090297876Abstract: A thermal barrier layer for metallic components, in particular for gas turbine components which are subject to high temperatures or hot gas, is disclosed. The thermal barrier layer includes an inner contact layer and an outer top layer, where the inner contact layer is applied to a surface of the component via an adhesion-promoting layer that is disposed therebetween, and between the outer top layer and the inner contact layer an intermediate layer is formed.Type: ApplicationFiled: June 12, 2007Publication date: December 3, 2009Applicant: MTU Aero Engines GmbHInventors: Stefan Schneiderbanger, Ralf Stolle, Thomas Uihlein, Wolfgang Wachter
-
Patent number: 6737110Abstract: A process for producing a thermal barrier coating, in which organometal complexes of zirconium and at least one stabilizing element selected from the group of the alkaline earth metals or rare earths are provided as starting substances, the starting substances are evaporated by heating and the coating gases that are generated in this manner are transported to a component to be coated, which is heated at a deposition temperature, where they are broken down so that a layer is deposited, in which process, in order to produce a thermal barrier coating with a columnar structure and a sufficient layer thickness, the starting substances are heated, at a process pressure of 0.5 to 50 mbar, to at most 250° C. so that the coating gases are formed, and the coating gases are transported to the component to be coated, the surface of which is heated at a deposition temperature of between 300° C. and 1100° C.Type: GrantFiled: November 30, 2001Date of Patent: May 18, 2004Assignee: MTU Aero Engines GmbHInventors: Ralf Stolle, Thomas Cosack, Klaus Schweitzer, Michael Pulver, Georg Wahl
-
Patent number: 6538728Abstract: The invention relates to a gas sensor with an open optical measurement path for optical measurement of at least one gas component, having a light source unit (1), a detector unit (2), between which units the optical measuring path (13) extends, and having a control and evaluation device; the light source unit (1) has a light source (3) and optical guide elements for transmitting a measuring light beam to the detector unit (2), and the detector unit (2) includes a detector (4), which when oriented in the beam path of the measuring light beam detects the intensity of light from the measuring light beam, and the control and evaluation device (11) is designed to determine, on the basis of the measurement signal of the detector (4), a standard for the concentration of the gas component to be investigated.Type: GrantFiled: June 15, 2000Date of Patent: March 25, 2003Assignee: Dräger Sicherheitstechnik GmbHInventors: Ralf Stolle, Hartmut Stark